Electric regulation.



v J. La CREVELING.

ELECTBIQ BEGULATIQN. APPLIOATION rILBD 00T. 11, 1910.

Patented Oct. 13, 1914.

MMV

Wl/VESSES Y vJOI-IN lCREVELING, OF NEW YORK, N. Y.,

ASSIGNOR T0 SAFETY CAR HEATING AND LIGHTING COMPANY, A CORPORATION 0F NEW JERSEY. A

ELECTRIC REGULATION.

Specification of Letters Patent,

Patented Oct. 13, 1914.

Application led Octob'er 11, 1910. Serial No. 586.481.

( '0 all lwhom. it may concern Bc it known that'I, JOHN L. Cam-BLING, a resident of New York, in the county and State of New York, have invented certain new and useful Improvements in Electrlc Regulation, as set forth in the annexed specification and drawing, forming a part thereof. f

-My invention pertains to that class of electrical regulation wherein it is Vdesired to automatically govern a dynamo or generator in a predetermined manner.

My invention has for its particularobject to provide means whereby 'a dynamo or generator may be automatically governed to produce certain given results throughout widely varying conditions.

A further object of my invention is to provide means whereby a dynamo driven at variable speeds may be automatically regu-l lated to properly charge a storage battery.

As my invention is particularly applicable to systems of electrical distribution wherein a dynamo driven at varying speeds is used to charge storage batteries and operate lamps orother translating devices, it will be de-v scribed in reference to such a system.

The drawing is a diagrammatic represen-- tation of one type of such system embodymg the essentials of my invention.

In the drawing 1 represents a dynamo or generator provided, with a field winding 2, having in series therewith a means for controlling the field magnetization` in this instance illustrated as the carbon pile 3.

,4 represents a lever normally drawn up` wardly by the adjustable spring 5, in such manner as to compress carbon pile 3 and reduce the resistance thereof.

6 represents a core of iron or other magnetic material attached to the lever 4 so that .the motion of the core 6 is imparted by the lever 4 to carbon pile 3. The positive terminal of the generator is carried as by lead 7 to the positive side of the storage battery 8 and lamps or other translating devices indicated by 9. The negative side of the lamps, or other translating devices, and the storage battery, are connected with the main 10 which is carried through the winding 11 to l the negative brush of the generator 1.

12 is a solenoid so arranged that when energized, it will tend to draw the core 6 in a downward direction. One end of the solenoid 12 is connected as by wire 13 with the carbon pile 14, the opposite end of which is Y connected as by wire 15 with the lead 7. The

other end of the solenoid 12 is connected with lead 10 as by wire 16.

17 represents a lever controlling the pressure upon carbon pile 14 and normally drawn in an upward direction as by the adjustable spring 18, and having its limit of motion in th1s direction governed as by adjustable screw 19. The lever 17 isprovided with a core of iron or other magnetic material, indic'ated at 2() in such relation to the solenoid 11 that excitation of the same tends to draw the core 2() in adownward direction and thus compress the ,carbon pile 14. 21 represents alever controlling the pressure upon the carbon pile 14, and normally drawn in an upward direction .1s by adjustable spring 22, the upward movement of said lever being limited by adjustable screw 23. The lever 21 carries the core 24, of iron or other magnetic material surrounded by the solenoid 25 in shunt4 across the battery as indicated, and so disposed that when energized, it will tend to cause the core 24 to be drawn downwardly, and the pressure upon the carbon pile to be increased.

The operation of`my invention is substan tially as follows: If the generator be running at such speed as to havean electromotive force sullieient to cause it to supply its normal maximum output, current will flow through the field 2 in a well-'known 'manner and the generator may be governed amount of resistance in the carbon pile 14.

I so adjust the spring 18'that when the normal current output of the `generator is reached, any further increase in current will cause the solenoid 11 to draw down core 204 and depress' the lever 17 in such manner as to compress the carbon pile 14 and increase-the current flowing in the winding 12 in such manner as to draw the -core 6 downwardly and depress the lever 4 against the action of spring 5 in such manner as to decrease the pressure upon the carbon pile 3 and increase the resistance thereof, so as to thus prevent the generator fromfdelivering a greater current. I also adjust thespring 22 in such manner that'when thc maximum charging voltage desired to have impressed across the storage battery 8 is reached, the coil i5 will cause core 24 to be drawn downwardly so as to depress the lever 2l and compress carbon pile 14 so as io reduce-the resist-ance thereof, and thus cause the-solenoid l2 to increase the resistance 3 and prevent the generator voltage 1 rom rising above this predetermined-limit. 'l`herefoie, the generator will at all times be governed in such manner that it cannot exceed its predetermined maximum current output, and if after supplying this current (o line tliestorage battery become charged until its voltage shall rise until the Yvoltage across the sa nie necessary to force the charging currenttheretlirougli, shall reach the maximum voltage for which the spring 22 adjusted. the-solenoid 25 will operate lever l as above described and prevent this .'oltage from being exceeded. Thus the battery will then be charged on a-constant potential circuit and the current supply thereto will gradually taper off to practically zero as the battery voltage approaches the voltage held constant by the coil 25, and while the batteries are thus being charged :it a constant-potential, the generator will be protected against overload from any ausc, by coil l1 in series therewith.

I .do -not u-'ishin any way to limitmyself to the exact details of construct-ion or inode of operation set forth in this drawing and specification, as I have nierel'y shown and described a. diagrammatic representation of one type of system embodying my invention, and it is obvious a wide-departure therefrom may be made without departing from tliescope of said invention which is set forth in tho following claims.

1. Means for regulating a generator comprehcnding regulating means, a coil for operating the same, means for controlling the euri-'ent in said coil and means for operating said controlling means operated by current fluctuations and operated by voltage flucfinitions.

2i- Means for regulating a generator coinprehendiiig a regulating element, a coil for sistance varying element and means responsive to current fluctuations for operating the said resistance element and means responsive to voltage fluctuations for controlling the resistance thereof.

4,-Means for regulating a generator, coz..- preliending a regulating mea-ns, electro-magnetic means for controlling the same actuated by a coil, means for controlling the current in said coil-comprehending a resistance varying element and means for operating the same alected by the current output of the generator, and means affected by the voltage of the generator for controlling the resistance thereof. v

5. Means for regulating a generator compreliending means for controlling the niagnetization thereof. a coil for operating said means and means for governing the current in said coil comprehending a resistance elenient and means responsive to current fluctuations for operating the same and means responsive to voltage fluctuations or affecting the same. p

6. The combination with a generator of means for governing the saine, electro-nia g- .netic means for controlling said governing mea ns, a resistance element for governing the controlling means, a current coil and means whereby the same varies said resistance elenient, a voltage coil and means whereby the saine controls -the resistance of said element.

L 7..'l`lie combinationvwith a generator of means for governing the same comprehendiag a governing element, means for controlling tlie saine` comprising an actuating coil and ineans for controlling the current in said coil eomprehending current controlling ,means an'd means for operating the saine comprising a.c0il in series with the generator and means for affecting the same comprising the coil in shunt to the generator.

8. Means for regulating a generator com` prcheiiding a regulating element, means for operating the same, means for controlling said operating means, means for operating 'said cciitrolling means responsive to current fluctuations and means for operating said controlling means affected by voltage fluetiiations.

9. Means for regulating a generator coinprehending a regulating eleluent,means for operating the Same, means for controlling said operating means, means for operating said controlling means responsive to Current fluctuations and means for affecting said controlling means. responsive to voltage fluctuations.

JHN L. CREVELING.

W'itnesses: I

ANiTA E. Tonus, Ciias. P. MCCHAPMAN.

Copies o! this patent may bc obtained for ve cents each, by addressing the Commissioner of Patents, Wlrhington, D. 0., 

